baber/WOPTO huggingface dataset:
Patent GB-636141-A (GB)
Title: Improvements in and relating to hand trucks and the like
IPC: B62B1/10
Filed: 1947-08-26
Abstract: 636,141. Combined hand truck and ladder. OZONIC, Ltd., and TOOLEY, H. V. Aug. 26,1947, No. 23543. [Class 20 (ii)] [Also in Groups XXX and XXXII] Part of a hand truck is formed as a ladder, having fixed rungs 10b and clips 10c whereby said truck is adapted to be retained upon the end of the floor or tailboard of a vehicle or a like raised platform.
Patent GB-1183327-A (GB)
Title: Machines for Manufacturing Hollow Bodies from Plastics
Inventor: GOLDRING JOHN ERNEST
IPC: B29C49/06
Filed: 1966-03-09
Abstract: 1,183,327. Injection-blow-moulding; neck-mould opening. COPE ALLMAN INTERNATIONAL Ltd. 6 March, 1967 [9 March, 1966 (2); 26 May, 1966], Nos. 10264/66, 10265/66, and 23611/66. Heading B5A. In an injection/blow-moulding machine wherein the blow-mould and core carrying the body are moved apart longitudinally after the blowing step, the neck-mould parts are opened by engagement between cam surfaces associated with the core and co-operating pins on opposite ends of the neck-mould carriers. As shown in Fig. 2, a horizontal section, the apparatus is fully closed and comprises a moving base-plate 7 having guides 8 in which moves a horizontally reciprocable sliding block 9 carrying the cores 19, fixed plates 5, 6 carrying the injection mechanism, injection moulds 15 and blow moulds 16. The neck moulds 22 are mounted on carriers 23 engaged by a stripper plate 25. From the position shown, wherein a parison has just been injection moulded and a previously injection-moulded parison has been blown, the plate 7 and block 9 move to the left, opening the moulds. The moulded parison and container are held by neck moulds 22. Due to the chains 11, which become taut on separating the cores and moulds, frame 10 and the stripper plate 25 aligned with the blow moulds are halted. The neck mould carriers 23 aligned with the blow moulds are opened by cams 26, releasing the blown containers while the cores 19 continue to withdraw, carrying the newly moulded parisons. The sliding block 9 is then moved horizontally by ram (20, Fig. 4, not shown) so that the parisons are opposite the previously idle blow-moulds and the empty cores are opposite the injection-moulds. Air is supplied to the blow-moulds by the action of ramp 48 which releases tappet valve 45. The apparatus is then closed, the neck moulds being closed around the empty cores by cams (26<SP>1</SP>, Figs. 4, 6a, 6b, not shown). As shown in Fig. 3, a composite vertical section, the block 9 also carries pillars 38, one pair of which are withdrawn from tappets 52, releasing valve plate 53, which closes the supply of material to the injection nozzle, the other pair engaging latches 41 (also Fig. 5, not shown) to pull the blowmould carriers 17 forwards and apart by the effect of rods 18, Fig. 2, until the latches are clear of the pillars. The whole cycle may be repeated continuously and automatically. The mould parts are also interchangeable.
Patent GB-628737-A (GB)
Title: Improvements in or relating to radio-frequency attenuators
IPC: H03H7/24
Filed: 1945-09-13
Abstract: 628,737. Attenuators. ADVANCE COMPONENTS, Ltd., and HATFIELD, R. H. Sept. 13, 1945, No. 23620. [Class 40 (viii)] An adjustable attenuator comprising series and shunt resistances is so constructed that it presents a constant impedance at ultra-high frequencies, the resistances and the cavities in which they lie being designed as sections of coaxial transmission-lines. An unbalanced ladder network is formed of series resistances 11 lying in a part-circular groove 10a and shunt resistances 12 lying in radial grooves 10b and connected to the casing 10 by screws 16. One pair of terminals comprises the casing and a conductor 14, and the other the casing and a conductor connected to a switch-arm 13, Fig. 3, the latter pair constituting a coaxial elbow coupling 23, Fig. 1. The switch-arm comprises a pair of springs, one of which is bent over at 13a, Fig. 3, to engage the domed heads of conducting rods 18 embedded in insulation 19, such as polystyrene, and leading to the junctions of the resistances 11, 12. The other spring carries a dome 25 of insulating material which sticks into indexing recesses 24 containing plugs of oiled felt for lubrication. The cover-plate 17 is divided along a diameter to check errors due to eddy currents at the setting for maximum attenuation.
Patent GB-1394777-A (GB)
Title: Circular knitting machine
IPC: D04B15/82
Filed: 1973-05-17
Abstract: 1394777 Knitting-machines ELITEXZAVODY TEXTILNIHO STROJIRENSTVI GENERALNI REDITELSTVI 17 May 1973 [8 June 1972] 23645/73 Heading D1C In a circular machine having a selector 20 associated with each needle and/or jack, the cam along which the end of the selector is guided is interrupted at each selection point where a spring urges certain selectors through the interruption unless an electromagnet maintains the selector position. In the embodiment shown the selectors are urged against the upper face 41 of a cam 31 by a spring 27. If at the interruptions, the electromagnet is unenergised a selector drops into the gap and is urged forward by face 42, towards jack 3. Selectors are restored to the original postion by cams 32, 43. If the electromagnet 39 is energised its force is greater than that of the spring and enables the selector to pass over the interruption. In an alternative embodiment (Figs 6, 7, not shown) the cam face (46) is radially inwards of depending butts (45) at the end of the selectors. Selectors urged downwards by a spring (27) at the interruption are maintained in a withdrawn, inoperative, postion by cam face 49. Energisation of the electromagnet keeps the selector ends on face (46) so that the butts (45) are urged to follow cam face (47) by the spring.
Patent GB-266395-A (GB)
Title: Improvements in or relating to acoustic apparatus
IPC: G11B3/00
Filed: 1925-09-22
Abstract: 266,395. Western Electric Co., Ltd., (Bell Telephone Laboratories, Inc.). Sept. 22, 1925. Magnetic instruments; diaphragms.-Relates to acoustic apparatus such as the sound-box of a phonograph or of a telephone receiver, comprising a chamber having a stationary wall and a vibratory wall or diaphragm for setting up sound vibrations. According to the invention, in order that the instantaneous velocity of the vibrating air may be constant throughout the chamber, the walls are so spaced from each other that successive areas extending from one wall to the other, through which the air is displaced, are proportional to the volumes of air displaced through those areas. Fig. 1 shows a sound-box having a diaphragm 62 and a stationary rear wall 61 with a delivery orifice 63, the diaphragm being vibrated by means of a stylus-bar 64. The surface 61 is so curved with respect to the diaphargm that the above-stated relationship holds good. Thus the ratio between the volume of air displaced by an annulus a<1> and the area b<1> between the edge of the annulus and the face 61 is equal to the ratio between the volume displaced by an annulus a<2> and the area b<2>, this ratio being also equal to the ratio between the total volume of air displaced by the diaphragm and the area of the opening 63. A formula whereby the requisite curvature of the wall 61 may be determined is given. Two modified forms of sound-boxes to which the invention is applied are described and illustrated. In one of these, the diaphragm is conical, and vibrates as a plunger, substantially without change of shape. The other form of sound-box, Fig. 4, comprises a corrugated diaphragm 12 and a casing having a corrugated rear wall 14, the shape of each portion of the back wall corresponding to each zone of the corrugations of the diaphragm being so determined as to fulfil the condition previously stated.
Patent GB-297107-A (GB)
Title: Improvements in brakes for machinery, vehicles and the like
IPC: F16D51/12
Filed: 1928-08-17
Abstract: 297,107. Sokal, S., (Priest's Brake Development Co., Ltd.). Aug. 17, 1928. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 17, 1928]. Blocks and shoes acting on drums; band; covers and protectors for brake.-A brake comprises a series of segments or shoes adapted to be forced outwardly to engage the inner surface of a brake drum or an intermediate split ring by the part rotation of a ring which is formed with or actuates cams engaging the inner surface of the segments. The drum is filled with oil and carries a washer and is formed with a screwthread to prevent the escape of the oil. According to one construction the segments or shoes 3 disposed within the brake drum 1 are held against rotation by the engagement of stops 5 secured to a fixed ring 2 with recesses in the ends of the segments. A ring 6 rotatable on the sleeve 18 is formed with cam surfaces 6<a> each in contact with a corresponding cam surface provided by a rib 4 projecting inwardly from each segment. The cam ring 6 is turned to force the shoes outwardly by a rock shaft 9 mounted in a bearing 10 on the fixed ring 2 and carrying an arm 11 having a slotted connection with a pin 12 on the ring 6. The shoes 3 may engage the drum directly or as shown a split ring 7 may be disposed between the shoes and the drum, this ring being held against rotation by a stop 8 on one of the shoes. A ring 24 secured to the stops 5 prevents side play of the shoes in the drum. The drum 1 may be filled with oil and for this purpose is provided with an end plate 1<a>. A felt washer 16 disposed between the plate 1<a> and the fixed sleeve 18 is caused to rotate with the arm and has a screw thread formation adapted to force inwards oil which tends to leak from the drum and to force outwards dirt which tends to enter the drum. According to another construction, Fig. 6, the shoes 3 are engaged by cam members 19 capable of being turned in recesses in the edge of the fixed disc 2 and provided with arms 21 engaging recesses 22 in the rotatable ring 6.
Patent GB-599288-A (GB)
Title: Improvements in the production of chlorinated aliphatic compounds
IPC: C07C17/10
Filed: 1945-09-14
Abstract: 1 : 1 : 2-Trichlorethane and alkyl substitution products thereof are prepared by bringing free chlorine into contact with ethylene dichloride or an alkyl substitution product thereof in the liquid phase at a temperature above 60 DEG  C. in the presence of a chloride of phosphorus in amount less than one molecular proportion for each two molecular proportions of ethylene dichloride or its alkyl substitution product.  An amount of phosphorus chloride of the order 1 to 5 per cent by weight of dichlorinated hydrocarbon is suitable. The process may be carried out at ordinary or higher pressures and generally at temperatures of 70 DEG  to 120 DEG  C.  In the preferred method, phosphorus pentachloride is added to the dichlorinated hydrocarbon which is then heated, preferably to its boiling point and a stream of chlorine passed in, the chlorine being dispersed for example by introducing it through a perforated disc; the 1 : 1 : 2-trichlorethane is separated by distillation from unreacted ethylene dichloride and tetrachlorethane formed at the higher reaction temperatures.  An example describes the chlorination of ethylene dichloride to 1 : 1 : 2-trichlorethane and in like manner there may be prepared 1 : 2 : 2-trichlorpropane from propylene dichloride and 2 : 2 : 3-trichlorbutane from 2 : 3-dichlorbutane.
Patent GB-238730-A (GB)
Title: Improvements in hubs and brakes for use on cycles and the like
IPC: B62L3/00
Filed: 1924-10-08
Abstract: 238,730. Triumph Cycle Co., Ltd., and Phillips, J. A. Oct. 8, 1924. Hubs. - A brake drum 9 for cycle &c. wheels is formed on a disc. 5 which has a flanged sleeve 3 embracing the hub barrel 1 and an inclined face 6 to which the inner ends 8 of the spokes are attached.
Patent GB-1019846-A (GB)
Title: Selective modulation of resonance lines in atomic spectra
IPC: G01N21/31
Filed: 1964-06-09
Abstract: 1,019,846. Photo-electric analysis. COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANIZATION. June 9, 1964 [June 12, 1963], No. 23879/64. Heading G1A. [Also in Divisions H1 and H4] A method for the selective modulation of resonance lines of an element contained in radiation emitted from an atomic spectral light source comprises producing an atomic vapour of the element by sputtering from a cathode containing the element, passing the radiation from the light source through the vapour, modulating the radiation passing through the vapour by modulating the sputtering current, and detecting the modulated radiation, e.g. in a photo-multiplier. The cathode is preferably a hollow cathode, open at both ends, the radiation passing axially through it, and the modulation of the sputtering current is preferably achieved by using an A.C. current.
Patent GB-171484-A (GB)
Title: Improvements in and relating to electric switches
IPC: H01H51/06
Filed: 1920-08-17
Abstract: 171,484. British Thomson - Houston Co., Ltd., (General Electric Co.). Aug. 17, 1920. Electromagnets. - A magnetic structure for electromagnetic switches comprises a fixed U-shaped magnetic frame 12 secured to a base, in the centre of which is mounted the operating solenoid 11 secured by a bolt 11<a>. The movable magnetic member consists of an oppositelydisposed U - shaped frame with limbs 14 parallel to the limbs of the fixed frame and a transverse portion 25 which is adapted to be attracted to the core 26. The movable magnetic member is pivoted at 24 to the fixed frame in a region comparatively free from magnetic flux, the pivots being arranged so that the armature is biassed by gravity towards its unattracted position, Fig. 3, a lug 36 limiting its motion by abutment against an adjustable stop 37. In the attracted position of the armature the flux between the armature and frame passes through air-gaps of low reluctance between the parallel legs of the fixed and movable members, these legs being then in alignment.
Patent GB-1449770-A (GB)
Title: Process for the manufacture of a dyed textil web
IPC: D06P7/00
Filed: 1974-05-30
Abstract: 1449770 Producing variable colour effects on textiles QUIKOTON AG 30 May 1974 [30 May 1973 29 June 1973 16 Nov 1973 8 May 1974] 24041/74 Heading D1B Textile materials which have a worn and faded appearance are produced by (1) treating the textile to give it a uniform ground colour having good fastness to washing and rubbing over the entire cross-section, (2) the textile is then provided with a surface colour using pigment dyes there being (a) colour difference between the ground colour and the surface colour corresponding to stage 4 or lower of the international grade scale "Aendern [altering]" (SNV 95.8.05) and (b) the fastness to rubbing of the surface dyeing being at least one stage lower on the quoted grade scale than that of the ground colour, (3) the material or fibres from step 2 are fixed, (4) if the textile material is not in a sheet form it is formed into a sheet, the textile material from 3 or 4 or the constituent fibres from 3 are subjected to a machine wash in order to achieve good fastness to washing, steps 4 and 5 be carried out in either order. The surface dyeing may be carried out with pigment dyestuffs using amounts of binder which are less than equivalent and are not sufficient for fixing the dyestuff to make it fast to rubbing. A patch pattern may be printed in the washed and dried, dyed sheet material and is then fixed within the core of a pigment print with weakened bonding of the pigment subsequent washing being effected to increase fastness to washing. Mixtures of fully dyed and undyed filaments may be woven or knitted into the sheet structure in a patterned arrangement. The ground colour may be the natural colour of the pretreated raw textile material, this being obtained by cleaning or bleaching. The starting material may be homogeneously dyed or optically brightened in stage (1). Pile fabrics, velvet, cord, twill and denim materials are dyed.
Patent GB-658942-A (GB)
Title: Improvements in or relating to radio repeater stations
Inventor: COLLINGS RUPERT HEDLEY PALK
IPC: H04B7/155
Filed: 1949-09-19
Abstract: 658,942. Radio signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 19, 1949, No. 24081. [Class 40 (v)] In a V.H.F. radio repeater station transmission is prevented when the signal strength falls below a predetermined value, or the noise level exceeds a predetermined value, by means actuated in dependence upon received signal strength or upon noise level at a predetermined circuit of the station. As shown in Fig. 2 a control voltage, derived from the LF. stage of a repeater of the type in which the received carrier frequency is retransmitted on a slightly different frequency, is applied to the control grid G2 of a control valve. The oscillator of the transmitting portion of the station comprises the tuned circuit L1, C1, and the other half of the double triode, the grid G1 of the oscillator valve being connected through a resistor R2 to the anode A2 of the control valve and through a resistor R3 to earth. While the grid G2 is highly negative with respect to the cathode no current flows through the control valve, the cathode tap T being adjusted so that in this condition the oscillator portion is working normally. When the negative potential on the grid G2 is reduced current commences to flow through the control valve increasing the potential drop across resistor R1 and lowering the potential of the grid G1 until oscillations stop, the position of the tap T or variation of one of the other resistors determining when this occurs. In Figs. 3 and 4 (not shown), this arrangement is applied to crystal controlled oscillators. In Figs. 5 and 6 (not shown), the oscillator valve is a pentode whose screen potential is reduced, to stop oscillations, by the increase of anode current through the control valve. In a further modification, Fig. 7 (not shown), the oscillator comprises a pentode associated with one portion of a double triode which acts as a cathode follower feeding back to the pentode through a piezo-electric crystal, the other portion of the double triode acting as a control valve to stop the oscillator.
Patent GB-702965-A (GB)
Title: Convertible chair-table
IPC: A47B85/04
Filed: 1951-10-17
Abstract: 702,965. Furniture combinations. BARNES, H. G. M. Oct. 13, 1952 [Oct. 17, 1951], No. 24170/51. Class 52(3) A chair convertible into a table comprises a legged underframe A and a top hinged thereto which in one position comprises the table top and in the other position comprises the chair back together with means for positively locking the back in either position. The top comprises a main portion B and two flaps C<SP>1</SP> C<SP>2</SP> hinged thereto, the flaps when the top is in chair position being adapted to be folded inwards to form struts to the main portion and to act as chair side wings. The flaps C<SP>1</SP>, C<SP>2</SP> are provided with catches D<SP>1</SP>, D<SP>2</SP> adapted to be engaged by catch plates and pawls E<SP>1</SP>, E<SP>2</SP> mounted on the underframe and operable by links J<SP>1</SP>, J<SP>2</SP>, J<SP>3</SP> disc H and trigger member F. In table position the main portion B is lockable to the underframe by a catch K which is releasable by the trigger member F while the flaps C<SP>1</SP>, C<SP>2</SP> may be held or supported in extended positions by slider rods N mounted on'the underframe.
Patent GB-656207-A (GB)
Title: Improvements in and relating to screens for cathode ray tubes in colour television systems
IPC: H04N9/26
Filed: 1948-09-15
Abstract: 656,207. Cathode-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 15, 1948, Nos. 24275 and 24276. Convention dates, Sept. 23, 1947. [Class 39 (i)] The spacing of the fluorescent colour lines or strips on a screen is varied to correct for parallax distortion by the deflecting wires, the spacing being increased from the centre line of the screen outwardly in accordance with the equation relating the distance of the strips from the axis to that of the control grid elements. The screen is manufactured by preparing a set of printing-plates as in photo-engraving. A photographic plate 22 with a coating of emulsion 23 is exposed through a lined screen 19 from a source 21, the source, lined screen and photographic plate being in the same relative positions as the electron gun, deflection wires and fluorescent screen of the discharge tube. The negative so obtained is printed on to a photosensitive copper printing plate, the emulsion becoming acid-resistant at exposed points. The printing-plate is used to print adhesive upon the plate of the fluorescent screen and the appropriate fluorescent powder is dusted on, excess being removed by brushing or a stream of air. The process is repeated for each of the fluorescent colours green, red and blue, the spacing of the red and blue being three times that of the green, e.g. 0.005 inch lines and 0.015 inch spacing. The red printing-plate may be inverted and used as the blue printer.
Patent GB-388751-A (GB)
Title: Improvements in or relating to processes of refining copper
IPC: C22B15/14
Filed: 1931-08-28
Abstract: In a modification of the process described in the parent Specification the deoxidizer, e.g. boride of calcium, aluminium, or silicon is added wholly or in part to the molten copper as it is being poured into the vessel lined with protective refractory material.  A small amount of the deoxidizer may be sprinkled over the surface of the vessel and copper foil capsules containing the boride or, alternatively, compressed pellets of the boride and copper filings or dust, are added to a stream of tough pitch copper as it enters the vessel.
Patent GB-367746-A (GB)
Title: Lining composition
IPC: C09D5/34
Filed: 1930-08-16
Abstract: A decorative lining, coating composition, or plaster comprises white lead, varnish, Spanish white, pigments, and an oil such as fat oil, neatsfoot oil or linseed oil.  The composition is spread upon glass sheets and then covered with fabric, paper, or the like.  This lining may be applied to furniture, ceilings, walls, and, if desired, may then be covered with sheets of glass.
Patent GB-1473191-A (GB)
Title: Packages
IPC: B65D5/468
Filed: 1974-06-06
Abstract: 1473191 Packaging CASTROL Ltd 6 June 1974 25054/74 Heading B8C An open-ended sleeve is wrapped around a unit, e.g. a can 19, having a handle which can be gripped through an opening 16B in the sleeve. A hinged flap, smaller than the opening, remains in the opening to guide a user's hand. There may be a plurality of cans in the sleeve and more than one opening in the top or side wall. Transparent or paper tape 23 may be applied across the ends of the sleeve and optionally be adhered to the units. The flap 15 of the sleeve may be secured by adhesive, tape and/or stitching.
Patent GB-185032-A (GB)
Title: Improvements in means for sealing the caps of sheet metal or the like canisters or receptacle
IPC: B21D51/26
Filed: 1921-09-22
Abstract: 185,032. Read, W. A. Sept. 22, 1921. Tube expanders.-Lever-caps 9, Fig. 3, which may be lined with paper &c. are sealed into canisters &c. by a series of circumferentially-disposed beaded spring or pivoted fingers 1 which are expanded by the lifting action of cam-levers 8, Fig. 1, on an internal cone 5. A spring 17 retracts the cone, and a resilient garter 16 may be fitted to close the sealing-fingers. The levers for lifting the cone may be formed like plier &c. handles so as to eliminate vertical pressure on the cap, and gauges may be provided to limit the expansion of the sealing-fingers and the depth of their insertion into the cap recess.
Patent GB-286751-A (GB)
Title: Art students' combined background and flower holder
IPC: B44D3/00
Filed: 1926-10-09
Abstract: 286,751. Ruck, C. P. Oct. 9, 1926. Flower vases and like receptacles. - A combined background and flower-holder for art students comprises a three-ply board A, Fig. 1, painted white, and adapted to be attached to a desk by means of wooden spring clips B, Fig. 4, a glass tube C being suspended in the centre of the board by a hinged metal bracket D.